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Forum: Pentax SLR Lens Discussion 07-23-2009, 04:49 PM  
Chromatic aberrations in 100mm macro?
Posted By inwonderland
Replies: 19
Views: 4,484
Thanks to everyone for your comments.

- Many of these were shot wide-open (I've posted a link to a much better image gallery w/ details of each shot)
- I am using a UV filter and lens hood

Picasa Web Albums - MH - Pentax D FA 1... -You can view as a slide show (I've put some of the exif details right in the captions) or download the full JPG.

All of these are using the K-7 with the D FA 100mm macro.

I'm still trying to find out whether my macro is a good or bad copy. I am already sending in my DA* 16-50mm to Pentax for a bad front focus issue and am wondering whether to include this one with it.
Forum: Pentax SLR Lens Discussion 07-22-2009, 09:11 AM  
Chromatic aberrations in 100mm macro?
Posted By inwonderland
Replies: 19
Views: 4,484
Hehe there was no blue light source on the jacket, that was sunlight. That's the problem.

Re: blurry -- don't have a tripod but I'll try taking some better shots.
Forum: Pentax SLR Lens Discussion 07-21-2009, 11:25 PM  
Chromatic aberrations in 100mm macro?
Posted By inwonderland
Replies: 19
Views: 4,484
Ugh. Sorry about that.

Here is a link that works (I think): Chromatic aberration on 100mm pentax macro pictures by mhuebert - Photobucket

Might need to click "full size" when hovering over the images to see it big enough.
Forum: Pentax SLR Lens Discussion 07-21-2009, 10:25 PM  
Chromatic aberrations in 100mm macro?
Posted By inwonderland
Replies: 19
Views: 4,484
Hey everyone,

I was very excited to receive my K-7, DA* 16-50mm 2.8 and D FA 100mm macro 2.8 today . It's my second DSLR kit... this spring I bought a Canon XSi but decided to upgrade to the Pentax... love the weather sealing, compact body, HD video etc.

I'm concerned that I may have a bad copy of the 100mm macro lens, but I'm not sure. A lot of my images have purple/blue fringes would seem to me to be quite obvious/distracting if blown up or printed at any decent size. However I haven't had a camera for 2 months, and I'm not experienced to begin with, so maybe I'm looking too closely? I know that some chromatic aberration is normal, but I don't recall seeing anything like this even on my ultra-cheap EF-S Canon lenses, so I thought I would check here to see what you guys think. Any comments would be much appreciated .
Below are some screenshots from within Lightroom.

Some thing in my front lawn:
http://i888.photobucket.com/albums/ac90/mhuebert/Picture343.jpg

Leather jacket:
http://i888.photobucket.com/albums/ac90/mhuebert/Picture338.jpg

Black text on whiteboard:
http://i888.photobucket.com/albums/ac90/mhuebert/Picture342.jpg

Nylon string (this one is not extreme but still, I was surprised to see any purple in this image at all):
http://i888.photobucket.com/albums/ac90/mhuebert/Picture340.jpg
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